Debug a sudden row explosion
Trace a row explosion to join grain before patching output.
Live query triage Sana expects 12,000 customers and gets 148,000 rows after adding invoices and payment attempts. The export deadline is today, and DISTINCT is one keystroke away. Each branch shows a consequence tied to SQL semantics. Symptom to semantics When a join multiplies rows, the database is usually telling the truth about relationships. One customer can have many invoices; one invoice can have many attempts. The fix is not to make rows disappear after the fact. The fix is to decide the target grain and shape each joined input to that grain before combining. Patch the syntax Fast but…
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